78051892 has 12 divisors (see below), whose sum is σ = 138462436. Its totient is φ = 38491200.

The previous prime is 78051889. The next prime is 78051901. The reversal of 78051892 is 29815087.

It can be written as a sum of positive squares in 2 ways, for example, as 37015056 + 41036836 = 6084^2 + 6406^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133359 + ... + 133942.

Almost surely, 2^78051892 is an apocalyptic number.

It is an amenable number.

78051892 is a deficient number, since it is larger than the sum of its proper divisors (60410544).

78051892 is a wasteful number, since it uses less digits than its factorization.

78051892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267378 (or 267376 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 78051892 is about 8834.6981838657. The cubic root of 78051892 is about 427.3605979366.

The spelling of 78051892 in words is "seventy-eight million, fifty-one thousand, eight hundred ninety-two".